Comprehensive history of RAF St. Georges is available on Wikipedia, so won't repeat it here. This area of the airfield (now Teeside Airport / Durham Valley) was occupied by a V-bomber dispersement site and housed pre-fab accommodation, briefing rooms and messing facilities for the V-bomber crews and their ground support staff. Because they were made from asbestos, this has meant they have survived to this day and probably for the foreseeable future.